Progressive native app are finally to transition from a niche technology to a long-term strategy. PWAs have quietly been pushing their way into the forefront of the mobile-web market for a few years, so you've probably heard of them. However, there have been a rush of recent upgrades indicating that this year may be the year when PWAs take center stage. This article serves as an overview, or guide, of progressive web apps, covering everything from what they are and why you should build one to the benefits and obstacles of doing so, as well as some use cases and resources you might need to get started. Use the table of contents as needed.